ISE, Inc. .
|  ISEinc.com  |  Variac.com  |   Literature & Documentation  |

Frequently Asked Questions
 

 
Knowledgebase Home | Glossary | Favorites | Contact Knowledgebase Home | Glossary | Favorites | Contact
Search the Knowledgebase Browse by Category

[Advanced Search]

Advanced Search
* Query:
  Categories:
  Rated:
Search Results for "variable transformer"
There were 19 questions found for your query:
  1. questionHow can I protect my three phase variable transformer from excessive currents?
    You may (and it is highly recommended) place a fuse in each phase between the variable transformer and the load. On the models listed the ouputs are terminals #3 on the three coils.One other cauti ...

  2. questionCan I vary the speed of my motor with a variable transformer?
    Many motors can use a variable transformer for speed control. Motors that usually can be controlled by varying the motor voltage:Universal MotorsSeries Wound MotorsTorque MotorsShaded Pole MotorsM ...

  3. questionAre there flux-coupling problems with variable transformers mounted closely?
    Coupling should be minimal but heating could be a problem - Provisions to allow heat to escape should be provided.

  4. questionIs any kind of calibration required and/or beneficial for a Variac?
    We do not consider our variable transformers as devices that require calibration unless they include a digital or analog meter.   A variable transformer only provides an output that is ...

  5. questionI have a very old Variac. Which model can be used to replace this variable transformer?
    The following link will cross reference most models. Variac Cross Reference Most models have the same mounting dimensions.  If your model is not listed please contact ISE for assistance.

  6. questionThe transformer dials shown on the site indicate from 0 to 100, yet out put is greater than 100v (140v). How does one know the output voltage when in use if not a Digital model?
    The variable transformer dials are marked as 0-100% of rated output voltage.  It is recommended that the dial to be used for estimating the output voltage only.  If the voltage needs to ...

  7. questionVariacs for my amp! I own an All-Tube (analog power) 100w guitar amp, and have recently been informed of a way to hook up a variac to the amp. By doing this, it allows the player to use the variac a
    Variable transformers (variacs) are commonly used with various tube type amplifiers and other tube type devices.  The primary purpose is to bring the voltage up slowly in order to extend the ...

  8. questionWhat is the difference between constant current and constant impedance ratings on Variac variable transformers.
    Constant Current Rating:  This is the continuous rated amperage at any output voltage. Constant Impedance Rating:  This is the maximum continuous amperage resistive load  at 100% ...

  9. questionVariacs and Guitar Amplifiers
    Variable transformers are used for several purposes with guitar amplifiers.    Tubes in amplifiers last longer if voltage is gently increased during power up.  The filaments in t ...

  10. questionHow do I use the 2300 with input voltages of greater than 50mV?
    The model 2300 supports the following signal types Thermocouple, PT100, DcmA, and DCmV. It is possible to use it with a DC voltage signal by using external resistors to drop the voltage sign ...

  11. questionAre there any recommendations for using Using our Variac® variable transformers for light dimming applications?
    Our Variac® variable transformers are often used for light dimming where electrical noise from common electronic dimmers is a concern.  Our variable transformers dim the lights using tr ...

  12. questionWhy are the valve motor drive (VMD) outputs limited to 120V AC operation?
    If the valve motor is driven directly by the controller output relays, the controller outputs are limited to half the voltage of their nominal rating. This restriction does not apply if the mo ...

  13. questionI cannot turn on Pre-Tune. What is likely causing this?
    Pre-tune cannot be activated if: 1) The setpoint is ramping.2) The process variable is less than 5% of span from the setpoint.3) The primary or secondary proportioning band is set to 0.

  14. questionWhat are the various display strategies available on the 4100/6100/8100+ controls? How do I change the strategy?
    Display Strategies Six (6) different display strategies are available with the 6100 Plus controls. As standard we ship the controls programmed for strategy #1. Strategy can be changed in the ...

  15. questionWhy does my display show [HH] instead of the Process Value?
    This error message indicates that the Process Variable is above the upper limit of the range. For example, if the temperature is 305C when the range is set for 0 to 300C. The 3 digit display as us ...

  16. questionWhy does my display show [LL] instead of the Process Value?
    This error message indicates that the Process Variable is below the lower limit of the range. For example, if the temperature is -5C when the range is set for 0 to 300C. The 3 digit display as use ...

  17. questionCan heater life be improved by using SCR power controls?
    SCR power controls can extend the life of your heaters by reducing thermal stress on your heaters.  The heaters are maintained at more constant temperatures reducing size changes in the hea ...

  18. questionWhat is the difference between Zero Fired and Phase Angle Fired SCR Power Controls?
    Phase Angle Fired SCR Power Controls Phase angle SCR power controls adjust the output voltage/wattage by delaying the turn on of the output voltage during each half cycle.  The end result ...

  19. questionHow do I set up Commander for use with my West 4400 Controls?
    West 4400 Series Setup Communications in 4400 as follows: Modbus Settings: (Commander also supports the 4400 with West ASCII although with less functionality) HwDefine Comms: SLA ...

 

Ask ISE a Question

   

Headquarters
10100 Royalton Rd.,  Cleveland, OH  44133  USA
Phone: (440) 237-3200  Fax: (440) 237-1744
Email ISE Cleveland
 
Toledo Area Office
417 Tomahawk Drive,  Maumee, Oh 43537
Phone: 419-893-3330 - FAX: 419-893-2151
Email ISE Toledo  
 

ISE, Inc. Privacy Policy

Click for Cleveland, Ohio Forecast Copyright © 2005 ISE, Inc.  All rights reserved.


Powered by ActiveKB Knowledgebase Software